1. Department of Neurology Saitama Medical University Saitama Japan
2. Department of Neurology Headache Center, Tominaga Hospital Osaka Japan
3. Department of Pediatrics and Neonatology Nagoya City University Graduate School of Medical Sciences Nagoya Japan
4. Department of Neurology Kitasato University School of Medicine Sagamihara Japan
5. Headache Care Unit Fujitsu Clinic Kawasaki Japan
6. Department of Neurosurgery Tokyo Medical University Hachioji Medical Center Hachioji Japan
7. Department of Obstetrics & Gynecology Chibune General Hospital Osaka Japan
8. Center for iPS Cell Research and Application (CiRA) Kyoto University Kyoto Japan
9. Department of Neurology Tokai University Tokyo Hospital Tokyo Japan
10. Department of Neurology Toshiba Rinkan Hospital Sagamihara Japan
11. Department of Neurology and Cerebrovascular Medicine Saitama International Medical Center, Saitama Medical University Saitama Japan
12. Department of Neurological Surgery, Graduate School of Medicine Nippon Medical School Musashi Kosugi Hospital Kanagawa Japan
13. Division of Neurology and Gerontology, Department of Internal Medicine Iwate Medical University Morioka Japan
14. Department of Pediatrics Hiroshima City Hiroshima Citizens Hospital Hiroshima Japan
15. Department of General Medicine Kitasato University School of Medicine Sagamihara Japan
16. Division of Neurology, Department of Brain and Neurosciences, Faculty of Medicine Tottori University Tottori Japan
17. Department of Neurology, Faculty of Medicine Kinki University Higashi‐osaka Japan
18. Department of Neurosurgery, Faculty of Medicine Yamagata University Yamagata Japan
19. Department of Medicine Tokyo Women's Medical University Medical Center East Tokyo Japan
20. Department of Neurology Keio University School of Medicine Tokyo Japan
21. Department of Neurology Saitama Neuropsychiatric Institute Saitama Japan
22. Department of Neurosurgery Yamaguchi University School of Medicine Yamaguchi Japan
23. Department of Neurology, National Center of Neurology and Psychiatry National Center Hospital Kodaira Japan
24. Department of Neurology Dokkyo Medical University Mibu Japan
25. Department of Neurology Hiroshima Red‐Cross Hospital and Atomic‐Bomb Survivors Hospital Hiroshima Japan
26. Department of Neurology Tokai University School of Medicine Tokyo Japan
27. Department of Psychosomatic Medicine Toho University Tokyo Japan
28. Department of Neurology Tokyo Women's Medical University Tokyo Japan
29. Department of Neurology Kitasato Institute Hospital Tokyo Japan
30. Department of Neurology National Hospital Organization Hokkaido Medical Center Sapporo Japan
31. Department of Pediatrics Tsukuba Gakuen Hospital Tsukuba Japan
32. Department of Neurology Neurological Institute, Ohta‐Atami Hospital Koriyama Japan
33. Department of Dentistry and Oral Surgery Keio University School of Medicine Tokyo Japan
34. Department of Neurology Dokkyo Medical University Nikko Medical Center Nikko Japan